DBI - 400 - Series
- DBI-401 - Repentance
- DBI-402 - Belief In John
- DBI-402b - Saving Faith
- DBI-403 - 4 Salvation Systems
- DBI-404 - Is Baptism Necessary
- DBI-405 - Lordship Salvation
- DBI-405b - MacArthur Salvation
- DBI-406 - Sanctification Views
- DBI-406b - Holy Spirit
- DBI-407 - Church Organization
- DBI-407b - Church Music
- DBI-408 - Prophecy
- DBI-408b - How God Treat His
- DBI-409 - Catholic Church
- DBI-409b - Do We Need a Pope
- DBI-410 - Calvinism
- DBI-411 - Pentecostalism
- DBI-412 - Healing Heresy
- DBI-413 - The Miraculous Today
- DBI-414 - Antinomianism
- DBI-415 - Cults
- DBI-416 - Questioning Xnty?
- DBI-417 - Evolution
- DBI-418 - My Answer to an Atheist
